package org.example;

import io.lettuce.core.RedisClient;
import io.lettuce.core.api.StatefulRedisConnection;
import io.lettuce.core.api.sync.RedisCommands;

public class RedisWatchRescue {
    public static void main(String[] args) {
        // 连接到 Redis 服务器
        RedisClient redisClient = RedisClient.create("redis://localhost"); // 这里替换为你的 Redis 服务器地址

        // 创建连接
        StatefulRedisConnection<String, String> connection = redisClient.connect();
        RedisCommands<String, String> syncCommands = connection.sync();

        // 监控某个键
        String monitoredKey = "your_key_to_monitor"; // 替换为你要监控的键名
        while (true) {
            // 检查键是否存在
            Long keyExists = syncCommands.exists(monitoredKey);
            if (keyExists != null && keyExists == 0) {
                System.out.println("Key '" + monitoredKey + "' is missing. Restoring from backup...");

                // 在这里实现从备份中恢复数据的逻辑
                // 这里可以调用备份数据的方法或逻辑来恢复丢失的数据

                // 恢复完成后重新设置键的值
                syncCommands.set(monitoredKey, "restored_value");

                System.out.println("Key '" + monitoredKey + "' has been restored.");
            }

            // 等待一段时间后再次检查
            try {
                Thread.sleep(5000); // 每隔5秒检查一次
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}
